It's not accessible from the engine bay. To reach it, you'll need to:
1. Lower the fuel tank - This involves disconnecting the fuel lines, electrical connectors, and support straps.
2. Remove the fuel pump module - This is a unit that contains the fuel pump, sending unit, and other components.
3. Access the fuel pump itself - It will be mounted inside the fuel pump module.
Note: This is a complex procedure and should only be attempted by someone with experience working on vehicles. It also requires specialized tools and knowledge about fuel system safety.
It's highly recommended to consult a repair manual specific to the 1984 Fiero for detailed instructions.